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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






2. Failure to have one testis (gonad) to descend






3. FEED






4. Superior genes are _______ to multiply






5. Days which have increasing daylight hours

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6. Birthing process (termination of gestation)






7. When are dairy cattle dehorned?






8. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






9. Start of the reproductive tract for the female. located outside of the body






10. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






11. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






12. 1-2 days






13. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






14. The more stressed out the male is - the less sperm he is going to produce






15. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






16. Allows extension of penis without fibro-elastic penis






17. Can survive ~7 days in cow. vast majority <48 hours






18. Microscopic - make sure not sterile - very few bulls are actually tested






19. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






20. 1-3 days






21. Animals which have only one estrous cycle (ex: dog - fox)






22. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






23. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated






24. 45-60 days after breeding; re-breed as required






25. Animals which have only one estrous cycle (ex: dog - fox)






26. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






27. Larger the cow - more milk is produced; smaller the cow - less milk is produced






28. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






29. (FSH) causes egg to mature in females






30. 30 hours after estrus begins






31. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






32. 4-6 days






33. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






34. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






35. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






36. Not under a timeline - cow can not be sold as steak






37. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






38. Can survive ~7 days in cow. vast majority <48 hours






39. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






40. 19-23 (21) days






41. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






42. 19-23 (21) days






43. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






44. Check feet and legs - look for masculine traits in build such as crest and muscling






45. Milk ~305 days - dry 60 days prior to calving






46. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






47. 1. brain function - 2. blood flow - 3. willing female






48. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






49. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






50. (male) pushes the testes upward toward the body for warmth or protection